Can Stoker and Propane boiler share chimney?

Can Stoker and Propane boiler share chimney?

PostBy: Wallknight On: Tue Aug 30, 2011 12:40 am

1906 house. Single-flu brick chimney- center of house, inlet in basement- Roughly 40' tall. I'm almost certain at some point it had a coal stove in it. Now, it has an old propane boiler exhausting through it. I just got a Kast Console II (goodbye Surdiac!). Can I share the chimney with the propane boiler? Both would be in the basement.
Wallknight
 
Stove/Furnace Make: Alaska
Stove/Furnace Model: Kast Console II

Re: Can Stoker and Propane boiler share chimney?

PostBy: Berlin On: Tue Aug 30, 2011 2:46 am

It won't agree with code, but the code was written to prevent oxygen from feeding a creosote chimney fire through another appliance, coal produces NO creosote. Yes, it can be done safely.
Berlin
 
Hot Air Coal Stoker Furnace: Will-Burt Combustioneer 77B
Coal Size/Type: Ohio BITUMINOUS pea stoker coal

Re: Can Stoker and Propane boiler share chimney?

PostBy: sterling40man On: Tue Aug 30, 2011 6:29 am

It's against code but alot of people do it. Just make sure you vent the stoker above the propane boiler.
sterling40man
 
Stoker Coal Boiler: Keystoker K6
Stove/Furnace Make: Keystoker
Stove/Furnace Model: KA-6


Re: Can Stoker and Propane boiler share chimney?

PostBy: steamup On: Tue Aug 30, 2011 8:22 am

Again, against code. Codes were written to protect idiots from themselves. Somewhere, sometime, somebody was injured for doing what you are suggesting.

I would never attempt it personnaly if there was any chance the propane and coal would be running at the same time. Sizing of the existing chimney could be an issue, plus the draft control devices are probably different and could fight each other.

Mutiple CO detectors are be a must regardless.
steamup
 
Stoker Coal Boiler: Axeman-Anderson AA-130, Keystoker K-6
Hand Fed Coal Boiler: HS Tarm 502 Wood/Coal/Oil
Coal Size/Type: pea, buck, rice

Re: Can Stoker and Propane boiler share chimney?

PostBy: Wallknight On: Tue Aug 30, 2011 10:32 am

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Ok- Here's the beast. If i recall, its a 6"x9" flu. Not much room above the LP exhaust. If I do it, I'd either tap into the galv pipe or open a new hole in the bricks under it (actually, that would be reopening an old hole.

By not venting 'above' the boiler, define 'above'
Wallknight
 
Stove/Furnace Make: Alaska
Stove/Furnace Model: Kast Console II

Re: Can Stoker and Propane boiler share chimney?

PostBy: 009to090 On: Tue Aug 30, 2011 10:57 am

Looks like that chimney goes up between floor joists, ceiling joists, and roof rafters. If this is true, I would build another flue right up alongside that brick chimney. Much safer than doing what you are suggesting.
009to090
 
Stoker Coal Boiler: EFM 520 HighBoy
Hot Air Coal Stoker Stove: DVC-500 x 2
Coal Size/Type: Anthracite Rice

Re: Can Stoker and Propane boiler share chimney?

PostBy: sterling40man On: Tue Aug 30, 2011 11:28 am

Wallknight wrote:By not venting 'above' the boiler, define 'above'


Pipe the stoker "above" the propane boiler.......stoker stoves are always venting exhaust (CO) into the chimney. That way you don't get any fumes into the room through the propane flue pipe. Cut another hole in the chimney below the hole you already have. Reconfigure the piping of your propane furnace and place it in the lower hole with the stoker piped into the upper hole. Try to get both holes at least 16" apart. Like steamup says.....multiple CO detectors will be a must.
sterling40man
 
Stoker Coal Boiler: Keystoker K6
Stove/Furnace Make: Keystoker
Stove/Furnace Model: KA-6

Re: Can Stoker and Propane boiler share chimney?

PostBy: Sting On: Tue Aug 30, 2011 1:12 pm

Power vent the Propane Appliance -- vent the Solid fuel naturally

Done

SAFE!
Sting
 
Other Heating: OBSO Lennox Pulse "Air Scorcher" burning NG

Re: Can Stoker and Propane boiler share chimney?

PostBy: Rob R. On: Tue Aug 30, 2011 1:16 pm

The sleeping dog has awakened...

Good suggestion Sting.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy

Re: Can Stoker and Propane boiler share chimney?

PostBy: steamup On: Tue Aug 30, 2011 2:44 pm

Looking at the picture it is obvious someone modified the chimney once before. The current location is much to close to the wood joists and floor deck to safely vent a solid fuel appliance. 18" min clearance for single wall pipe. Less for double wall depending on the manufacturer's UL listing.

That propane boiler is no spring chicken. Sting has the right idea.
steamup
 
Stoker Coal Boiler: Axeman-Anderson AA-130, Keystoker K-6
Hand Fed Coal Boiler: HS Tarm 502 Wood/Coal/Oil
Coal Size/Type: pea, buck, rice

Re: Can Stoker and Propane boiler share chimney?

PostBy: sterling40man On: Tue Aug 30, 2011 2:47 pm

Sting has the right and safest idea for sure. I bet Wallknight is trying to save some money in this rough economy. I know quite a few people that vented their chimney this way and it's worked for them for years.
sterling40man
 
Stoker Coal Boiler: Keystoker K6
Stove/Furnace Make: Keystoker
Stove/Furnace Model: KA-6

Re: Can Stoker and Propane boiler share chimney?

PostBy: lowfog01 On: Tue Aug 30, 2011 3:12 pm

Yeah, I know a lot of people have done this safely for years and realistically there is only one time you need to meet code - the morning after you've had a fire and are talking to your insurance company. That's not a gamble I'd be willing to take. No, Sting has the best solution and it doesn't cost all that much for the peace of mind. Lisa
lowfog01
 
Hand Fed Coal Stove: Mark II & Mark I
Coal Size/Type: nut/pea

Re: Can Stoker and Propane boiler share chimney?

PostBy: Berlin On: Tue Aug 30, 2011 3:12 pm

If done properly running the coal stove and the furnace into the same stack isn't any more dangerous than running your water heater and furnace into the same chimney which is allowed by code. two appliance are allowed, different fuels aren't allowed because of the chimney fire danger with wood. as far as safety goes, be sure you have proper clearances from the floor joists, make sure the chimney doesn't dead-end (be sure that there is a cleanout located substantially lower than the lowest flue and keep it clean of birds and debris) and you will be as safe as can be. done properly it is as safe or safer than powerventing anything.

Lisa, i'm sure there are many things in everyone's house that doesn't meet current code, especially in an older home. this idea that an insurance company is going to deny coverage for something that doesn't meet code and is unrelated to the cause of the fire that burned your home down is absurd. Unless the insurance company can determine that you rigged something with the intent to purposefully burn your home down to collect the insurance money, they will cover a loss resulting from almost any stupid thing you do.
Berlin
 
Hot Air Coal Stoker Furnace: Will-Burt Combustioneer 77B
Coal Size/Type: Ohio BITUMINOUS pea stoker coal

Re: Can Stoker and Propane boiler share chimney?

PostBy: lowfog01 On: Tue Aug 30, 2011 4:27 pm

Hi Berlin,

I beg to differ. It's been my experience that insurance companies go out of their way to find ways not to pay claims. Sure there are a lot of older home with things out of current code but I suspect that since this is a new appliance addition and that requires a code inspection (at least in my county) if it has a fire traced back to it, they will be checking to see the county inspection records. It's for that reason I always pull a permit for everything, even if I'm doing the work. Just my opinion, but that's not a gamble I'm willing to take. Lisa
lowfog01
 
Hand Fed Coal Stove: Mark II & Mark I
Coal Size/Type: nut/pea

Re: Can Stoker and Propane boiler share chimney?

PostBy: Berlin On: Tue Aug 30, 2011 6:50 pm

well, I disagree lisa. Regardless, what the OP's trying to do will cause no fire hazard or risk of loss. It can be done safely without blindly following code.
Berlin
 
Hot Air Coal Stoker Furnace: Will-Burt Combustioneer 77B
Coal Size/Type: Ohio BITUMINOUS pea stoker coal